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A key characteristic of life is the ability to separate the external environment from the internal space. To do this, cells have evolved semi-permeable membranes that regulate the passage of biological molecules. Additionally, the cell membrane defines a cell’s shape and interactions with the external environment. Eukaryotic cell membranes also serve to compartmentalize the internal space into organelles, including the endomembrane structures of the nucleus, endoplasmic reticulum and...
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Laminins are heterotrimeric proteins with high molecular mass found in the extracellular matrix. Each laminin molecule is composed of three chains, viz. alpha, beta, and gamma, coded by five, four, and three paralogous genes, respectively. Laminins are categories based on the compositions of the three chains.
In humans, the five forms of alpha chains are LAMA 1, LAMA 2, LAMA 3, LAMA 4, and LAMA 5. The four forms of beta chains are LAMB 1, LAMB 2, LAMB 3, and LAMB 4. The three forms of gamma...
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A tissue membrane is a thin layer of cells that covers the outside of the body, the organs, internal passageways that lead to the exterior of the body, and the lining of the moveable joint cavities. There are two basic types of tissue membranes— connective tissue and epithelial membranes.
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The extracellular matrix or ECM holds cells together to form a tissue and allows the cells within the tissue to communicate. ECM comprises proteins such as fibronectin, collagen, laminin, etc. The most abundant protein in this space is collagen. Collagen fibers are interwoven with carbohydrate-containing protein molecules called proteoglycans. ECM allows cell migration and provides a structural scaffold at cell adhesion that anchors the cell when the extracellular matrix proteins interact with...
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Updated: Sep 9, 2025

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Un vistazo a las membranas del sótano

Rachel Lennon1, David R Sherwood2

  • 1Manchester Cell-Matrix Centre, Faculty of Biology Medicine and Health, The University of Manchester, Manchester M13 9PT, UK.

Journal of cell science
|September 3, 2025
PubMed
Resumen
Este resumen es generado por máquina.

Las membranas basales (BM) son antiguas matrices extracelulares cruciales para la estructura y función de los tejidos. Comprender su composición y los cambios en el envejecimiento y la enfermedad ofrece nuevas vías terapéuticas.

Palabras clave:
EnvejecimientoMembranas para el sótanoLas enfermedadesComposición de la membrana

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Área de la Ciencia:

  • La bioquímica
  • Biología celular
  • Investigación de la matriz extracelular

Sus antecedentes:

  • Las membranas basales (BM) son matrices extracelulares animales esenciales que subyacen y rodean a la mayoría de los tejidos.
  • Proporcionan andamios estructurales y resistencia a la tracción a través de componentes centrales como la laminina y el colágeno IV.
  • Los BM contienen más de 150 proteínas secretadas y 50 receptores celulares, que permiten diversas funciones específicas del tejido.

Objetivo del estudio:

  • Revisar el conocimiento actual de la composición, formación y función de la membrana basal.
  • Para explorar cómo los BM se adaptan a funciones específicas de los tejidos, incluida la filtración, la formación de órganos y la señalización celular.
  • Para esbozar los cambios que sufren los BM con el envejecimiento y la enfermedad.

Principales métodos:

  • Revisión de la literatura de la investigación existente en la biología de la membrana del sótano.
  • Análisis de la composición molecular y la organización estructural de las MBS.
  • Examen de las funciones funcionales y las asociaciones de enfermedades de las proteínas BM.

Principales resultados:

  • Los BM son estructuras complejas construidas a partir de redes autoasociadas de laminina y colágeno IV, complementadas por numerosas otras proteínas.
  • Los BM realizan funciones críticas como la filtración, la organización de los tejidos y la orientación del comportamiento celular.
  • Los defectos en las proteínas BM están vinculados a más de 100 fenotipos de enfermedades humanas.

Conclusiones:

  • Las membranas del sótano son vitales para la salud de los tejidos y la homeostasis.
  • La desregulación de la composición y función de los músculos musculares contribuye a numerosas enfermedades.
  • La investigación adicional sobre la biología de la fibromialgia es crucial para desarrollar nuevas estrategias terapéuticas para los trastornos humanos.